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A k-nearest neighbor classification rule based on Dempster-Shafer theory

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1 Author(s)
Denoeux, T. ; URA CNRS, Univ. de Technol. de Compiegne

In this paper, the problem of classifying an unseen pattern on the basis of its nearest neighbors in a recorded data set is addressed from the point of view of Dempster-Shafer theory. Each neighbor of a sample to be classified is considered as an item of evidence that supports certain hypotheses regarding the class membership of that pattern. The degree of support is defined as a function of the distance between the two vectors. The evidence of the k nearest neighbors is then pooled by means of Dempster's rule of combination. This approach provides a global treatment of such issues as ambiguity and distance rejection, and imperfect knowledge regarding the class membership of training patterns. The effectiveness of this classification scheme as compared to the voting and distance-weighted k-NN procedures is demonstrated using several sets of simulated and real-world data

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Systems, Man and Cybernetics, IEEE Transactions on  (Volume:25 ,  Issue: 5 )